Hi Helena In order to be scientific(?) I've just filled one with water, put the lid on as tight as possible, turned it upside down and shaken it. It leaked. Hope this helps! (they do look lovely though, and obviously don't take up much room)
By tigris on 14 January 2015
I have not put mine in a dishwasher yet. I have, however, used them to store pasta sauce etc. And I make it a point to wash them as soon as they're empty. So far they're not stained. :) Still nice and clean.
By Yvette on 04 January 2015